TypeError: Cannot read properties of null (reading 'firstElementChild')

[NemanjaRCT]

I want to have small menu on diagram's node. When clicking on button, I want to both center node and show that menu. Without centering, it works perfectly. But when I use this.chart.setCentered(id).render(), node is centered but menu is not shown, and in console I have error: TypeError: Cannot read properties of null (reading 'firstElementChild'). And everything becomes pretty slow and buggy.
My question is, how can I implement center node and to keep that menu opened? I am using angular.

[bumbeishvili]

Can you provide an example where the issue is reproduced?

You can fork this sample and extend it

https://stackblitz.com/edit/js-yw1urt?file=index.html